Attachment, detachment, and spiritual tact

Their exact blending [of attachment and detachment] calls for a spiritual tact which is the strength and virtue proper to the masters of the interior life…It would clearly be as absurd to prescribe unlimited development or renunciation as it would be to set no bounds to eating or fasting. In the spiritual life, as in all organic processes, everyone has their optimum and it is just as harmful to go beyond it as not to attain it.